Microbiology

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    Protocols in Current Issue
    Cost Effective Method for gDNA Isolation from the Cecal Content and High Yield Procedure for RNA Isolation from the Colonic Tissue of Mice
    Authors:  Sohini Mukhopadhyay and Palok Aich, date: 08/05/2022, view: 423, Q&A: 0
    [Abstract]

    Microbiome studies are quickly gaining momentum. Since most of the resident microbes (consisting of bacteria, fungi, and viruses) are difficult to culture, sequencing the microbial genome is the method of choice to characterize them. It is therefore important to have efficient methodology for gDNA isolation of gut microbes. Mouse models are widely

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    A β-glucuronidase (GUS) Based Bacterial Competition Assay to Assess Fine Differences in Fitness during Plant Infection
    Authors:  Julien S. Luneau, Laurent D. Noël, Emmanuelle Lauber and Alice Boulanger, date: 07/05/2022, view: 1058, Q&A: 0
    [Abstract]

    Competition assays are a simple phenotyping strategy that confront two bacterial strains to evaluate their relative fitness. Because they are more accurate than single-strain growth assays, competition assays can be used to highlight slight differences that would not otherwise be detectable. In the frame of host-pathogens interactions, they can be

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    Purification of the Bacterial Amyloid “Curli” from Salmonella enterica Serovar Typhimurium and Detection of Curli from Infected Host Tissues
    [Abstract]

    Microbiologists are learning to appreciate the importance of “functional amyloids” that are produced by numerous bacterial species and have impacts beyond the microbial world. These structures are used by bacteria to link together, presumably to increase survival, protect against harsh conditions, and perhaps to influence cell-cell

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    Quantification of Bacterial Loads in Caenorhabditis elegans
    [Abstract]

    Caenorhabditis elegans is a ubiquitous free-living nematode that feeds on bacteria. The organism was introduced into a laboratory setting in the 1970s and has since gained popularity as a model to study host-bacteria interactions. One advantage of using C. elegans is that its intestine can be colonized by the bacteria on which it feeds.

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    Bacterial Infection with Listeria monocytogenes in Mice and Subsequent Analysis of Antigen-Specific CD8 T Cell Responses
    Authors:  Bojana Jakic, Janine Kimpel, William J. Olson, Verena Labi and Natascha Hermann-Kleiter, date: 12/05/2021, view: 1646, Q&A: 0
    [Abstract]

    Pathogens such as bacteria, viruses, fungi, or protozoa can cause acute and chronic infections in their hosts. The intracellular bacterium Listeria monocytogenes serves as a model pathogen to assess the molecular mechanisms regulating CD8 T cell activation, differentiation, and function. We set up an experimental workflow to investigate

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    A Retro-orbital Sinus Injection Mouse Model to Study Early Events and Reorganization of the Astrocytic Network during Pneumococcal Meningitis
    Authors:  Chakir Bello, Martine Cohen-Salmon and Guy Tran Van Nhieu, date: 12/05/2021, view: 1135, Q&A: 0
    [Abstract]

    Pneumococcal (PN) meningitis is a life-threatening disease with high mortality rates that leads to permanent neurological sequelae. Studies of the process of bacterial crossing of the blood brain barrier (BBB) are hampered by the lack of relevant in vitro and in vivo models of meningitis that recapitulate the human disease. PN meningitis involves

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    An Inexpensive Imaging Platform to Record and Quantitate Bacterial Swarming
    Authors:  Weijie Chen, Sridhar Mani and Jay X. Tang, date: 09/20/2021, view: 1575, Q&A: 0
    [Abstract]

    Bacterial swarming refers to a rapid spread, with coordinated motion, of flagellated bacteria on a semi-solid surface (Harshey, 2003). There has been extensive study on this particular mode of motility because of its interesting biological and physical relevance, e.g., enhanced antibiotic resistance (Kearns, 2010) and turbulent collective motion

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    Microscopic Detection of ASC Inflammasomes in Bone Marrow Derived Macrophages Post Stimulation
    Authors:  Longjun Li, Rudi Mao and Xiaopeng Qi, date: 09/05/2021, view: 2143, Q&A: 0
    [Abstract]

    An inflammasome is an intracellular multiprotein complex that plays important roles in host defense and inflammatory responses. Inflammasomes are typically composed of the adaptor protein apoptosis-associated speck-like protein containing a CARD (ASC), cytoplasmic sensor protein, and the effector protein pro-caspase-1. ASC assembly into a protein

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    Tomato Stem Injection for the Precise Assessment of Ralstonia solanacearum Fitness in Planta
    Authors:  Yaru Wang, Liu Xian, Gang Yu and Alberto P. Macho, date: 08/20/2021, view: 1768, Q&A: 0
    [Abstract]

    Ralstonia solanacearum is a soil-borne pathogen with worldwide distribution that causes bacterial wilt disease in more than 250 plant species. R. solanacearum invades plants through the roots, reaches the vascular system, and colonizes the whole plant by moving through the xylem, where it eventually replicates rapidly, causing plant death. Usual

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    Tracking the Subcellular Localization of Surface Proteins in Staphylococcus aureus by Immunofluorescence Microscopy
    Authors:  Salvatore J. Scaffidi, Mac A. Shebes and Wenqi Yu, date: 05/20/2021, view: 4798, Q&A: 0
    [Abstract]

    Surface proteins of Staphylococcus aureus and other Gram-positive bacteria play essential roles in bacterial colonization and host-microbe interactions. Surface protein precursors containing a YSIRK/GXXS signal peptide are translocated across the septal membrane at mid-cell, anchored to the cell wall peptidoglycan at the cross-wall compartment,

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